Properties of the atoms
This presentation is the property of its rightful owner.
Sponsored Links
1 / 14

Properties of the atoms PowerPoint PPT Presentation


  • 72 Views
  • Uploaded on
  • Presentation posted in: General

Properties of the atoms. Valence electrons. 5 electrons in their outermost shell, that is 2 electrons in the S subshell and 3 unpaired electrons in the p subshell . . electro negativity.

Download Presentation

Properties of the atoms

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Properties of the atoms

Properties of the atoms


Valence electrons

Valence electrons

5 electrons in their outermost shell, that is 2 electrons in the S subshell and 3 unpaired electrons in the p subshell.


Electro negativity

electro negativity

  • The elements of nitrogen family have high value of electro negativity. This value shows a decreasing trend in moving down the group.


Ionization energy

Ionization energy

  • The ionization values of the elements of this group decreases down the group.


Chemical properties

Chemical Properties

The pnictogen family contains nitrogen, phosphourus, arsenic, antimony, and bismuth. Common chemical properties among these elements include…


Chemical properties1

Chemical Properties

  • Nitrogen is non-flammable, and will not support combustion

  • Nitrogen will form compounds with the aid of a catalyst

  • Phosphourusis spontaneously flammable when exposed to air

  • Phosphourus is also a deadly poison

  • Arsenic burns in high temperatures and forms clouds of arsenic trioxide

  • Arsenic tarnishes rapidly in the air

  • Antimony is a poor conductor of heat and electricity

  • Antimony’s alloys expand when cooled

  • Bismuth has very high electrical resistance

  • Bismuth dissolves in concentrated nitric air


Reactions

Reactions

Phosphorus reacting in air

Liquid nitrogen reaction

http://www.youtube.com/watch?v=MXjn8h3-SQk

http://www.youtube.com/watch?v=0NdKKtfzmLs


Everyday use

Everyday use

  • Bismuth – hair dye, Pepto Bismol, and lipstick. Also used in low melting alloys to make fire alarms.

    • Antimony- rubber, fireworks, bullets, and power generators.

  • Arsenic – Poison(=o), preserves wood, weed killer, batteries, watches, clocks, and calculators.


Oh look more uses

Oh look, more uses….

  • Ununpentium- scientific research, no other use at the moment.

  • Phosphorus – baking soda, plates (fine china), fireworks, fertilizer, and glass.

  • Nitrogen- light bulbs, preserve paper, force oil up, frozen food, and explosives.


Physical properties

Physical Properties

  • Phosphorus, Arsenic, Antimony, Bismuth, and Ununpentium are Solid at room temperature Expect for Nitrogen, a Gas.

  • Nitrogen and Bismuth are both part of the Nitrogen (Pnictogen) group but Nitrogen is a transparent Gas and Bismuth is a pinkish Metallic Solid.


More properties

More Properties

  • Bismuth

    • Atomic weight- 208.980380

    • Density- 9.78g/cm -3

    • Melting point- 271.5 C

    • Boiling point- 1564 C

  • Antimony

    • Atomic weight – 121.760000

    • Density- 6.697 cm -3

    • Melting point- 630.63 C

    • Boiling point- 1587 C


Even more

Even more…

  • Arsenic

    • Atomic weight - 74.921600

    • Density- 5.727G/Cm -3

    • Melting point- 817 C

    • Boiling point- 613 C

  • Ununpentium

    • Atomic weight – 289.000000Density- unknown

    • Melting point- unknown

    • Boiling point- unknown


  • Last two

    Last two!

    • Phosphorus

      • Atomic weight – 30.973762Density- 1.82 G/Cm -3

      • Melting point- 44.15 C

      • Boiling point- 280.5 C

  • Nitrogen

    • Atomic weight – 14.0067Density- 0.0012506 G/Cm -3

    • Melting point- - 210 C

    • Boiling point- -195.79 C


  • Citied

    Citied

    • http://www.chm.bris.ac.uk/motm/pnictogen/pnictogenh.htm

    • http://www.ptable.com/

    • http://modelscience.com/PeriodicTable.html

    • http://education.jlab.org/itselemental/ele115.html

    • http://www.carondelet.pvt.k12.ca.us/Family/Science/Nitrogen/bismuth.html


  • Login